U.S. Stocks Finish Best Quarter in More Than 20 Years

U.S. stocks wrapped up their best quarter in more than 20 years, a remarkable rally after the coronavirus pandemic brought business around the world to a virtual standstill.

Just three months ago, investors were lamenting the end of the bull market—and the longest economic expansion on record—after major U.S. stock indexes lost about 35% of their value in less than six weeks. The subsequent rebound has been nearly as brisk.

Partly…